Mainly because when we are born , we are given only so long to make a lasting good impression upon Earth and when it runs out, its all over for us and time to move on. None of us knows how long we are given so best make the most of what we think we have. But it seems that the bad have more time than the good do. We are not given the opportunity to buy or trade time units so if we choose to waste them then its truly sad but if we do some everlasting good, then we will be remembered long after we are gone. So live for today as none of us are promised tomorrow

Time might be compared to a large, swift river. It is ever flowing forward. You cannot stop it, nor can you use every drop that flows by. Centuries ago, people began building waterwheels on riverbanks. With them, they harnessed energy from the flowing water to operate their grindstones, sawmills, pumps, and hammers.

Similarly, you can harness time, not to save it, but to use it to accomplish good work. Because time wait for no one. Indeed, time flows relentlessly forward like a steady stream. It cannot be reversed or saved; once it is gone, it is gone forever.